Brief description of fluoroplastic wire extrusion process

- Dec 19, 2019-

Fluoroplastic wire is a kind of high temperature wire. Common insulation materials are ETFE, FEP and PFA. Among them, ETFE can be used with rated temperature of 180 ℃, FEP of 200 ℃, and PFA of 250 ℃. The following three extrusion processes are mainly used in the production of fluoroplastic high temperature lines.

1. Hot extrusion process When the temperature of the internal barrel of the extruder reaches about 350 ° C to 390 ° C, FEP fluoroplastic is added to the hopper, and the thrust of the screw rotation is used to uniformly and continuously cover the conductive material through the forming mold. On the core, set after cooling. This method uses Φ30, Φ60, Φ90 and other high-temperature plastic extruder, and often produces F46, F40 and other fluoroplastic insulation products.

2. Pushing process Pre-press the powdered PTFE plastic into a barrel shape, put it into the machine barrel, and use the piston thrust to cover the conductive wire core uniformly and continuously through the forming mold, and then perform 380. C is sintered at high temperature and then set after cooling. This method uses F4 pusher to produce F4 (PTFE) type products.

3. Wrapping process Wrap the Teflon film tape cut into a certain width onto the core, and then sinter and shape it. This method uses a winding machine and a sintering furnace, and usually produces AFR and FSFB wires.